Lc 350 tipping falling into corners

[killer]

Hi all fairly new hear first post .My 350lc feels like its falling/ tipping into  corners at slow speeds . I have fitted taperd roller bearings onto stearing shaft any ideas welcome 

[arrow]

Welcome in. It's funny how you mention those bearings. I had this once on a fizzy. The cause was over tight steering head bearings.

[shaunthe2nd]

Corner at higher speeds! ;-)

[killer]

Thanks for reply arrow will try loosening stearing head although lock to lock is fairly loose n free .

[killer]

Will also try the high speed cornering when i dont feel like im falling off 🤣 cheers

[donkeychomp]

Joking aside it could be anything. Is everything bolted to the bike secure? Engine bolts, forks, rear shock etc. I'm assuming this is a stock bike so how old is the shock? Have the forks been rebuilt? Tyres. How old? Right size too? Is the frame straight? If the answer is yes to all of this...then it's an LC. Ride around the foibles!

Alex

[reedpete]

Jun 19, 2024 21:26:52 GMT 1 killer said:

Hi all fairly new hear first post .My 350lc feels like its falling/ tipping into  corners at slow speeds . I have fitted taperd roller bearings onto stearing shaft any ideas welcome 

If you are saying that the way it steers feels very weird compared to before you fitted the tapered bearings then I’d suggest something is now incorrect. Are you sure you removed all parts of the ball bearing seats ?

[Tobyjugs]

Welcome to the forum.
I know the feeling you describe. For me it is normally due to incorrect (low) tyre pressures.
Also lowering the front of the bike or lifting the back of the bike up can give the same feeling.

[urbantangleweed]

I presume you've checked the obvious things like tyre pressures or play in either front or rear wheel bearings, swingarm or suspension linkages?

[killer]

Thanks guys solved problem to tight stearing head and 45 psi in front wheel handels ok now but got a new problem
Poor running runs ok ish on choke but speeds up off choke then bogs down when i rev it Obviously a carbs issue will look at it at weekend

[zig]

Jun 20, 2024 5:09:18 GMT 1 Tobyjugs said:

Welcome to the forum.
I know the feeling you describe. For me it is normally due to incorrect (low) tyre pressures.
Also lowering the front of the bike or lifting the back of the bike up can give the same feeling.

just what i was going to say Tobyjugs

i had the same experience some years ago on a friends bike and it turned out to be less than 10psi in the front tyre and not far of that in the rear ..... scary 


ZiG

[midlifecrisisrd]

45psi 😱😱😱😱

A good 10 too high surely

As for the running I'd say blocked pilot jets

Steve

[tony2stroke]

Dunlop say 36 front and 42 rear for thier tyres on vintage bikes.

45 is way too high as has been said.

[arrow]

Jun 20, 2024 18:38:45 GMT 1 tony2stroke said:

Dunlop say 36 front and 42 rear for thier tyres on vintage bikes.

45 is way too high as has been said.

"Vintage bikes"
That made me feel quite old!

[killer]

Leson lernt when iv had new tyres fitted check your pressures. Going to remove carbs and give them a good service only had this lc since january but done a nut n bolt rebuild exept on engine as it was running fine before strip down.when i figure out how to post pics I'll posed some before n after pics.

[arrow]

Jun 20, 2024 19:13:35 GMT 1 killer said:

Leson lernt when iv had new tyres fitted check your pressures. Going to remove carbs and give them a good service only had this lc since january but done a nut n bolt rebuild exept on engine as it was running fine before strip down.when i figure out how to post pics I'll posed some before n after pics.

Easiest way to post pics is to use the Tapatalk app on your phone. 👍

[killer]

Thanks arrow will give it a go later🙂🍻

[shaunthe2nd]

Jun 20, 2024 19:13:35 GMT 1 killer said:

Leson lernt when iv had new tyres fitted check your pressures. Going to remove carbs and give them a good service only had this lc since january but done a nut n bolt rebuild exept on engine as it was running fine before strip down.when i figure out how to post pics I'll posed some before n after pics.

Do the balls out and clean the air circuit behind once you have them out. Cause of a lot of running problems with modern fuels.

[killer]

Thanks for advice shaunthe2nd but would look stupid cleaning carbs with my balls out. Seriously what do you mean and how would i perform this

[chrisg]

Jun 20, 2024 18:50:30 GMT 1 arrow said:

Jun 20, 2024 18:38:45 GMT 1 tony2stroke said:

Dunlop say 36 front and 42 rear for thier tyres on vintage bikes.

45 is way too high as has been said.

"Vintage bikes"
That made me feel quite old!

Surely were "Vintage" riders as well. 

[chrisg]

There is a thread on removing the brass balls, I'm think it was Dusty that posted it. I cant find it but I'm sure its in here.

Basically centre pop the brass balls on the inlet of the carbs and drill a small hole. With the opposite end of your drill that you used put the shank in the hole and gently move the ball and remove, may need some heat.

Then the carbs can be ultrasonically cleaned. You can pop a small ball bearing back and pean the opening in or most people tap and fit a small grub screw with locktite.

[killer]

Thanks chrisg will look for post 🙂

[steve63]

Too tight head set bearings or notched bearings produce a kind of rolling/slow weaving sensation mainly at low speed. It's similar to too little pressure in the front tyre. Low tyre pressure feels better when accelerating and terrible when braking. I guess high pressure in the front would be like being on a tiny contact patch and then falling off the edge. I raised the pre-load on my VFR and it tipped into corners much nicer, did the same with my R1. The VFR seemed off a few weeks ago, it was harder to change direction. It turned out to be a few psi down in the rear tyre. Put the recommended in and it was better. Later I fitted a new tyre and the same pressure and it was better still.

[masonmart]

Jun 19, 2024 21:26:52 GMT 1 killer said:

Hi all fairly new hear first post .My 350lc feels like its falling/ tipping into  corners at slow speeds . I have fitted taperd roller bearings onto stearing shaft any ideas welcome 

At low speed, steering is by steering geometry only and at higher speed when there is angular momentum in the front wheel, by counter steering. There is a cross over where both work, exactly the same as a push bike. If the steering is too tight to steer by geometry the bike will fall into the corner as there is no moment to stop it falling, only going faster or leaning vertically to establish balance will solve it. At low speeds leaning into the corner isn't what to do. You control how it steers at low speed by handlebar position so I'd say that the steering was too tight.

MM